
<!DOCTYPE HTML>
<html>
<head>
  <title>上传图片</title>
  <meta charset="utf-8">
</head>
<body>
<iframe name="uploadfrm" id="uploadfrm" style="display: none;"></iframe>
<form name="formHead" method="post" action="" id="formHead" enctype="multipart/form-data" target="uploadfrm">

  <div>
    <div>
      <input type="file" name="file_head" id="file_head" onchange="javascript:setImagePreview();" />
    </div>
    <div>
      <div id="DivUp" style="display: none">
        <input type="submit" data-inline="true" id="BtnUp" value="确认上传" data-mini="true" />
      </div>
    </div>
  </div>
</form>
<div data-role="fieldcontain">
  <div id="localImag">
    <img id="preview" width="-1" height="-1" style="display: none" />
  </div>
</div>


<script type="text/javascript">
  function setImagePreview() {
    var preview, img_txt, localImag, file_head = document.getElementById("file_head"),
      picture = file_head.value;
    if (!picture.match(/.jpg|.gif|.png|.bmp/i)) return alert("您上传的图片格式不正确，请重新选择！"),
      !1;
    if (preview = document.getElementById("preview"), file_head.files && file_head.files[0]) preview.style.display = "block",
      preview.style.width = "63px",
      preview.style.height = "63px",
      preview.src = window.navigator.userAgent.indexOf("Chrome") >= 1 || window.navigator.userAgent.indexOf("Safari") >= 1 ? window.webkitURL.createObjectURL(file_head.files[0]) : window.URL.createObjectURL(file_head.files[0]);
    else {
      file_head.select(),
        file_head.blur(),
        img_txt = document.selection.createRange().text,
        localImag = document.getElementById("localImag"),
        localImag.style.width = "63px",
        localImag.style.height = "63px";
      try {
        localImag.style.filter = "progid:DXImageTransform.Microsoft.AlphaImageLoader(sizingMethod=scale)",
          localImag.filters.item("DXImageTransform.Microsoft.AlphaImageLoader").src = img_txt
      } catch(f) {
        return alert("您上传的图片格式不正确，请重新选择！"),
          !1
      }
      preview.style.display = "none",
        document.selection.empty()
    }
    return document.getElementById("DivUp").style.display = "block",
      !0
  }
</script>
</body>
</html>

